Question

the muscular system is essential because it allows our bones to
(1 point)
○ strengthen.
○ contract.
○ lengthen.
○ move.

Explanation:

The muscular system works in conjunction with the skeletal system; muscles contract and relax to pull on bones, which enables bone movement. Bones are strengthened by factors like exercise and calcium, muscles themselves contract/lengthen, but the key role of the muscular system for bones is enabling movement.

Answer:

D. move.